Dell PowerConnect 8100 CLI Reference Guide - Page 636

A user configures an ACL permit rule to force its matching traffic stream to a specific egress interface, bypassing any forwarding decision normally performed by the device. The interface can be a physical port or a LAG. The redirect interface rule action is independent of, but compatible with, the assign queue rule action. ACLs can be configured to apply to a VLAN instead of an interface. Traffic tagged with a VLAN ID (either receive-tagged or tagged by ingress process such as PVID) is evaluated for a match regardless of the interface on which it is received. Layer 2 ACLs The Layer 2 ACL feature provides access list capability by allowing classification on the Layer 2 header of an Ethernet frame, including the 802.1Q VLAN tag(s). In addition, the rule action set is enhanced to designate which (egress) CoS queue should handle the traffic, and whether the traffic flow is to be redirected to a specific outgoing interface. MAC access lists are identified by a user-specified name instead of a number. Layer 3/4 IPv4 ACLs The Layer 3/4 ACL feature supports IP access lists, both standard and extended. These lists check the Layer 3 portion of a packet, looking specifically at information contained in the IP header and, in certain cases, the TCP or UDP header. An Ethertype of 0x0800 is assumed in the case of IP access lists. Permit and deny actions are supported for each ACL rule. Standard layer 3/4 ACLs can be classified based on the source IP address and netmask or other extended classification criteria. Class of Service (CoS) The PowerConnect CoS Queueing feature allows the user to directly configure device queueing and, therefore, provide the desired QoS behavior without the complexities of DiffServ. The CoS feature allows the user to determine the following queue behavior: • Queue Mapping - Trusted Port Queue Mapping 636 QoS Commands